species that should not be on the unified checklist

[timadriaens]

Hi, scrolling through some emerging species products further down the pipeline and through the unified checklist itself, there are still a number of species that should not occur on the unified checklist. I use this issue to report them:

• Carex pendula (Hangende zegge is a native species, the reference given in the unified is https://doi.org/10.15468/wtda1m which is the MAP, but this species in not on MAP): see https://github.com/trias-project/unified-checklist/issues/53

• Anser anser (mixed populations, should be excluded from alien bird checklist)

• Branta leucopsis (mixed populations, should be excluded from alien bird checklist)

• Junco hyemalis (vagrant, should be excluded from alien bird checklist) see this issue

[peterdesmet]

Since the unified is not the source of the last 3 errors, I will move this issue to the bird checklist and create a new in unified.